The word masculinises is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 21
Highest Scoring Words With Friends™ Play In The Letters masculinises
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Seven Letter Word Alert: (56 words)
acumens, aimless, amnesic, assumes, caesium, caseins, cauline, celsius, cesiums, cinemas, classes, clauses, cuisine, emulsic, emulsin, encalms, icemans, icemass, iciness, incises, inseams, inulase, laicise, lassies, leucism, liaises, macules, malices, manless, menisci, mensual, minuses, miscues, missals, missile, misuses, mueslis, muscles, musical, muslins, mussels, sacless, salines, seismic, seminal, sensual, silanes, silicas, simians, similes, sinless, sinuses, sluices, sunless, unlaces, unseals